The Adler’s Dr. Walkowicz explains NASA’s big announcement and what it means for space exploration

UNSPECIFIED: In this NASA digital illustration handout released on February 22, 2017, an artist's concept shows what the TRAPPIST-1 planetary system may look like, based on available data about the planets' diameters, masses and distances from the host star. The system has been revealed through observations from NASA's Spitzer Space Telescope as well as other ground-based observatories, and the ground-based TRAPPIST telescope for which it was named after. The seven planets of TRAPPIST-1 are all Earth-sized and terrestrial, according to research published in 2017 in the journal Nature. TRAPPIST-1 is an ultra-cool dwarf star in the constellation Aquarius, and its planets orbit very close to it. They are likely all tidally locked, meaning the same face of the planet is always pointed at the star, as the same side of our moon is always pointed at Earth. This creates a perpetual night side and perpetual day side on each planet. TRAPPIST-1b and c receive the most light from the star and would be the warmest. TRAPPIST-1e, f and g all orbit in the habitable zone, the area where liquid water is most likely to be detected. But any of the planets could potentially harbor liquid water, depending on their compositions. In the imagined planets shown here, TRAPPIST-1b is shown as a larger analogue to Jupiter's moon Io. TRAPPIST-1d is depicted with a narrow band of water near the terminator, the divide between a hot, dry day and an ice-covered night side. TRAPPIST-1e and TRAPPIST-1f are both shown covered in water, but with progressively larger ice caps on the night side. TRAPPIST-1g is portrayed with an atmosphere like Neptune's, although it is still a rocky world. TRAPPIST-1h, the farthest from the star, would be the coldest. It is portrayed here as an icy world, similar to Jupiter's moon Europa, but the least is known about it. (Photo digital Illustration by NASA/NASA via Getty Images)

Dr. Lucianne Walkowicz is an Astronomer at the Adler Planetarium in Chicago, where she studies stellar magnetic activity and how stars influence a planet’s suitability as a host for alien life. Dr. Walkowicz joins Roe Conn and Anna Davlantes to talk about the discovery of a star 39 light years away has 7 earth-like planets orbiting it.

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